from django.db import models

# Create your models here.
from django.db import models


class Question(models.Model):
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField("date published")


class Choice(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)
    from django.db import models

    class Question(models.Model):
        # ...已有代码不用动
        def __str__(self):
            return self.question_text

    class Choice(models.Model):
        # ...已有代码不用动
        def __str__(self):
            return self.choice_text

        import datetime

        from django.db import models
        from django.utils import timezone

        class Question(models.Model):
            # ...已有代码不用动
            def was_published_recently(self):
                return self.pub_date >= timezone.now() - datetime.timedelta(days=1)